Auto S14 Q's

[JayDee M Rolly]

first problem is that it is making a clunking sound when i brake in the back, my friend mentioned that it could be a sub frame bushing.

the second problem is that my rpm meter doesnt work, how do i get it to work?

[5t341tH]

wtf noob? search!
haha jk, yea, i think its the subframe bushing for the clunking. but im open to other ideas. it also clunks going down after a speeedbump